| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2005-2025 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| typedef int (*callback_t) (void); |
| |
| int |
| caller (callback_t callback) |
| { |
| /* Ensure some frame content to push away the return address. */ |
| volatile const long one = 1; |
| |
| /* Modify the return value to prevent any tail-call optimization. */ |
| return (*callback) () - one; |
| } |
